.views{
    width: 100%;
    height: 100vh;
    overflow: hidden;
}
.header{
    width: 100%;
    height: 80px;
    background-color: aqua;
}
.main{
    width: 100%;
    height: calc(100% - 160px);
    display: flex;
    flex-direction: row;
}
.main .two{
    width: 200px;
    height: 100%;
    background-color: greenyellow;
}
.main .mid{
    flex: 1;
    height: 100%;
    background-color: pink;
}
.footer{
    width: 100%;
    height: 80px;
    background-color:brown;
}